变电站电气主接线是指变电站的变压器、输电线路怎样与电力系统相连接，从而完成输配电任务。变电站的主接线是电力系统接线组成中一个重要组成部分Unit 5First AidPart 1Words and expressions 变电站电气主接线是指变电站的变压器、输电线路怎样与电力系统相连接，从而完成输配电任务。变电站的主接线是电力系统接线组成中一个重要组成部分aid: 1) v. aid sb. to do sth. aid sb. in doing/with sth. I aided her to continue her study.=I aided her in continuing her study.=I aided her with her study.2) n. first aid 急救 a hearing aid 助听器with the aid of/with sbs aid 在的帮助下 in aid of 用以援助.; 作为援助.之用 eg. collect money in aid of the poor come /go to sb.s aid 前来/ 去援助某人gi
